US2707028A - Punching machine with provision for removing the punchings - Google Patents

Description

April 26, 1955 R. B. BURTON 2,707,028

PUNCHING MACHINE WITH PROVISION FOR REMOVING THE PUNCHINGS Filed March 9, 1951 ll 20 I i s United States Patent Office 2,707,028

Patented Apr. 26, 1955 movement of the die incidental to its motion into and withdrawal from the cup. The punching thus is cut out 2 707 028 and immediately thrust into the exhaust passage extension PUNCHING MACHINE WITH PROVISION FOR 5 effectively to carry the punching along the extension 20 REMOVENG THE PUNCHINGS and down through the central exhaust passage 18 where it is intercepted by a screen 22 and drops to a place of col- Ralph B. Burton, Tunbridge, Vt. lection, here shogvn as a removable can 24 am aware t at the invention may be embodied in Appllcatlml March 1951, Serial 214,314 10 other specific forms without departing from the spirit or 3 Claims. (CL essential attributes thereof, and I therefore desire the This invention relates to a machine for punching a slot had to the appended claims to indicate those principles in sh eet metal work pieces, exemplified for the purpose of of the invention exemplified by the particular embodiment the present disclosure by a machine wherein a cup-shaped described and which I desire to secure by Letteis Patent sheet metal stamping used as a closure for a friction top claim: can is slotted through one of the walls of the cup to pro- 1. In combination a rotary turret having on a face vide for the assembly of an opener lever therewith. This thereof adjacent the periphery holders for pieces of work, assembly may be eflected in the same machine by means and punching means comprising a punch and die between not necessary here to disclose Suc a machine is diswhich the pieces are positioned successively on rotation closed in the patent to Whelan No 2627,104 dated of the turret, said die having a throu h opening, the l ebruary 3 1953, to which reference may be had The punch and the die when in operative position having their object is to provide an improved mechanism for removaxes in a plane substantially parallel to the face of said ing by suction the unching or strip of metal thus detached turret, an exhaust conduit extending through the rotary mm the work, both to prevent it trom becoming involved axis of the turret, and a tubular connection connected to with parts 0L the machine with possible damage thereto or said conduit and extending to the back of the die openinterference with a subsequent operation and to provide ing, and suction creating means connected to said conduit for its convenient disposition in a single place. through which connection the punchings are carried away. The invention will be well understood by reference to in a machine for slottin the walls of cup-shaped the following description taken in connection with the pieces, a rotary turret having on a face thereof adjacent accompanying drawing showing a side view of the machine the periphery holders for such pieces, punching mechawith parts broken away. nisrn comprising a punch and die between which the e invention as disclosed in the drawings is applied pieces are positioned successively on rotation of the turto a machine as disclosed in the Whelan patent above reret, means for actuating said parts to position the die at ferred to, but there is herein shown only so much of that one side of the wall to be slotted and then to drive the machine as is necessary for an understanding of the punch in a plane substantially parallel to said face of means for disposing of the punchin s As seen in the the turret through the wall into the die, an exhaust condrawings it may comprise a conveyor or turret 10 having duit extending through the rotary axis of the turret, said along its periphery pockets 12 which receive the individual conduit having connected theieto a flexible portion, which closures. The turret is rotated intermittently and at one portion is connected to the back of the die opening, and point the closure carried thereby is brought to rest opsuction creating means connected to said conduit to cause posite a punch 14. By suitable means as fully disclosed the punchings to be drawn therethrough. in said Whelan patent a cooperating female die 16 is at 3. In a machine for slotting the walls of cup-shaped the proper time lowered into the cup C and the punch pieces, a rotary turret having on a face thereof adjacent 1 is actuated to cut from the wall f of the cup the punchthe periphery, holders for such pieces, punching mechaing p to drive it into or through the female die and the nism coniprisin a punch and die between which pieces die then withdrawn before the cup C moves on to the next are positioned successively on rotation of the turret with operating station in the cycle of the machine. Obviously the punch and die when in operative position at opposite if this were all either the detached metal punching would sides of said wall and having their axes in a plane subbe left in the closure or would be driven out into a clostantially paiallel to said face of the turret, a conduit for sure at some subsequent operation of the punch carrying away the punchings comprising a tube extending o carry away the punchings and deliver them to a through the axis of said turret said conduithavingafiexiplace from which they can be readily removed in mass 5 his connection extending to the back of the die and an ex aust conduit 18 is organized as a portion of the having suction creating means attached thereto to cause rotary axis of the turret the lower end of this conduit the punchings to be drawn through said conduit.

eing in communication with a source or negative pressgre no; ShOKVI}. Wrcn the mechanical construction is as R fer n s Cit d in the file of this patent s own y W e an, t e conduit may be formed by an axial i passageway through the fixed shaft about which the tur- UNTED STATES PATENTS ret is turned. In practice it is found that a fan having 273,734 Hobbs Mar. 13, 1883 about the capacity of a common household vacuum 477,899 Jones June 28, 1892 cleaner is satisfactory. From the upper end of this con- 149,005 T rapp Mar. 24, 1894 duit a tubular extension 20 leads to a point adjacent the 6,, 1,080,073 Morehouse Dec. 2, 1913 female die 16 to receive the punchings driven there- 1,876,650 Farmer Sept. 13,1932 through. As shown this extension is connected directly 2,130,235 Heyman Sept. 13, 1938 to the back of the die and is flexible to accommodate the 2,587,214 Polk Feb. 26, 1952

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